Sleeping trouble,please help?

Does anyone else have the same problem, since I found out 3 weeks ago I am pregnant, my sleep has completely gone out the window... I fall asleep straight away and find myself wake up tossing and turning lots in the night and needing to pee.. Part of me thinks because I have also immediately stopped smoking the min I found out I am pregnant this could be the reason. Does anyone else have this sleeping problem and is there anything we can take that won't harm my blueberry ??